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Engine timming

Tiny
TIMWAGNER
  • MEMBER
  • CHEVROLET S-10
Hi, I need help figuring out why on my 2000 s-10 with 4.3 and 4wd 86000 mi manual trans, the timming is -8 degrees so therefore its very sluggish lack of power etc, Ive changed cam sensor, crank sensor, ecm, coil, spark control even distributor, nothing changed the performance is worse when the a/c is on, I guess due to the additional demand for power, I would really appreciate any help. Thx Tim also I want to add there is no check engine light and with the ecm the knock sensor was changed also. Thx again
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Friday, August 24th, 2007 AT 3:25 PM

7 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Do you have a scantool? If so attach it to the DLC, warm up engine then increase RPM to 1000 + Rpm.
Read the cam retard offset, if its Zero degrees + or - 2 its in spec, if not follow same steps but first loosen the distributor hold down bolt then start enginge and adjust to zero + or - 2!
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Friday, August 24th, 2007 AT 4:10 PM
Tiny
TIMWAGNER
  • MEMBER
  • 5 POSTS
No scan too but I have a friend that does, will try that but I can tell you that from the last time I had the scanner on it it said -8 and as far as the distributor, its in a fixed position, how do you adjust? Thx again tim
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Friday, August 24th, 2007 AT 4:24 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
There is a hold down bolt at it's base. Loosen it but dont remove it! Then you can turn the distributor.
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Friday, August 24th, 2007 AT 4:27 PM
Tiny
TIMWAGNER
  • MEMBER
  • 5 POSTS
Ok thanks ill try that, I just didnt think it would move much.
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Friday, August 24th, 2007 AT 4:39 PM
Tiny
TIMWAGNER
  • MEMBER
  • 5 POSTS
Ok thanks ill try that, I just didnt think it would move much.[/Quote:75c359b606] there is no adjustment in the distributor as I thought, im at a loss on this, maybe its a wiring problem?
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Saturday, August 25th, 2007 AT 8:36 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Try increasing the RPM so it's over 1000! And your not trying to set the timming by the marks on the harmonic balance are you. Bad. Follw my previous instructions SCANTOOL REQUIRED!
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Sunday, August 26th, 2007 AT 5:41 AM
Tiny
TIMWAGNER
  • MEMBER
  • 5 POSTS
No, we did use the scanner maybe im being thick headed but arent u still saying that u have to turn the distributor? Im very curious to know how to make a timming adjustment without, and yes we did increase the rpm, s too thx for your continued help.
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Sunday, August 26th, 2007 AT 7:06 AM

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